Shear



Mm.. M., W5@ o. H. PEARSON SHEAR Filed Deo.

C@ m LW WA W M M Patented Jan. 31, 71950 STATES PTNT OFFICE 2 Claims.

My invention relates to shears and is particularly adapted for thecutting of non-metallic sheet material such as asbestos sheets, composition shingles, wall board and the like.

To this end I have developed a shear comprising a relatively fixed bodyhaving laterally spaced parallel shearing edges. Cooperating with therelatively Xed body, I provide a shearing knife which is pivoted to therelatively fixed body for pivotal movements into and out of the spacebetween the spaced shearing edges of the body. The shearing knife is ofa width to work snugly between the spaced shearing edges of the fixedbody and has a blunt serrated, arcuate cutting edge.

One of the objects of my invention is the provision of a shear which canbe used to accurately and quickly cut sheet materials of the class abovedescribed and which will stand a great deal of cutting without becomingdull.

A still further object of, my invention is the provision of a shear forthe above purposes which can be manufactured cheaply, which is of ruggedconstruction and which can be transported with the minimum of effort.

The above and still further objects of my invention become apparent fromthe following specification, attached drawings and appended claims.

Referring to the drawings in which like characters indicate like partsthroughout the several views:

Fig. 1 is a side elevation, some parts and one position thereof beingindicated by dotted lines;

Fig. 2 is a top elevation;

Fig. 3 is a view similar to Fig. 2 but with the shearing blade beingshown in vertical position and cut away;

Fig. 4 is an enlarged sectional View taken on the line li-li of Fig. 1;

Fig. 5 is a fragmentary View in side elevation of the movable shearingblade; and

Fig. 6 is a sectional view taken on the line 6--15 of Fig. 5.

Referring more particularly to the drawings, the numerals I and 2indicate a pair of matched elongated bars, forming the relatively fixedbody portion and which are rigidly fastened together near their rearends by any suitable means such as a screw threaded nut and boltindicated in its entirety by the numeral 3. As shown, those por tions ofbars I and 2, in front of the rigid connection 3, are verticallyarranged, whereas those portions to the rear of connection 3 are twistedto a horizontal position and are in the nature of spaced balancing feet4 and 5 having apertures 6 and I therein for the purpose of receiving anail or screw to fasten them securely to the ioor or other object.

As shown, members I and 2 diverge slightly in a forward direction fromconnection 3 to a point where a spacer washer 8, cooperating with therivet 9 which passes therethrough, retains them in a definitely spacedrelationship.

Between the spacer washer 8 and their extreme forward ends, body membersI and 2 are maintained in a parallel relationship. A shearing knife IUis shown as having its front end pivoted between the front ends ofmembers I and 2. Cutting blade I0 is of a thickness corresponding to thewidth of spacing member 8 so as to retain the front end of bars I and 2in parallel relationship. Pivot pin II, which has an enlarged head I2 onone end and a screw threaded nut I3 on the other, also passes throughthe upper ends of a pair of spaced bracket forming angle irons I4 andthus retains the front ends of body members I and 2 in an elevatedposition. Feet I5 of bracket members I4 are provided with apertures I5for securing the front end of the fixed body portion to a oor or thelike, if desired. It will also be observed, particularly by reference toFig. 1 that the feet 4 and 5 are bent downwardly with respect to thefront and intermediate portions of body portions I and 2. The opposedupper edges of the spaced parallel front ends of body portions I and 2act as shearing edges between which the shearing blade I is adapted towork snugly as it is moved into and out of the space therebetween.

By reference to Fig. 6, it will be observed that the cutting edge I8 isvery blunt. In fact it is of a width, as above stated, only slightlyless than the distance between the spaced shearing edges I1. As shownparticularly in Figs. 1 and 5, the cutting edge I8 of shearing knife I0is arcuate in shape and is provided with serrations or teeth I9. A metalstrap 20, centrally looped at 2I to form a handle portion and havingspaced front end portions 22 is secured to shearing blade I0 by suitablemeans such as screw threaded bolts 23 and nuts 24. As will be observed,the forward ends 22 of strap 20 rest upon the upper edges of xed bodymembers I and 2 and thus limit the downward movement of shearing bladeIll.

While I have illustrated and described a cornmercial form of myinvention, as provided by Sec. 4888 of the United States Statutes, itshould be obvious that the structure illustrated could be modied withoutdeparting from the spirit of the invention as defined by the appendedclaims.

What I claim is:

1. A shear for non-metallic sheet material comprising a relatively xedbody having laterally spaced parallel shearing edges, a shearing knifepivoted to said relatively Xed body for pivotal movements into and outof the space between the spaced shearing edges of the body, saidshearing knife being of a Width to work snugly between the spacedshearing edges of said body and having a blunt, serrated, arcuatecutting edge, said relatively fixed body comprising a pair of elongatedhorizontally disposed bars, means connecting said bars with portionsthereof in parallel spaced relation in the provision o said shearingedges, a pair of supporting brackets anchored to adjacent ends of saidbars by means providing the pivot for said knife, the opposite ends ofsaid brackets being bent downwardly and laterally in the provision ofsupporting legs.

2. The structure according to claim :1 wherein said shearing knife isdisposed between and secured to the end portions of a metal strap loopedintermediate said end portions in the provision of a handle, said endportion being vertically alined with the parallel spaced portions ofsaid bars whereby the shearing knife is limited in its shearing actionby engagement of said portions of the bars and strap.

OSCAR H. PEARSON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS VNumber Name Date 1,509,150 Kent Sept. 23, 19242,219,602 Rayner Oct. 29, 1940 2,395,978 Swenson Mar. 5, 1946 FOREIGNPATENTS Number Country Date .368,661 Great Britain yMar. 10, 1932552,211 Germany June 10, 1932 599,632 France Oct. 23, 1925 612,747France Aug. 7, 1926 811,707 France Jan. 23, 1937

